1263324857 has 2 divisors, whose sum is σ = 1263324858. Its totient is φ = 1263324856.

The previous prime is 1263324847. The next prime is 1263324863. The reversal of 1263324857 is 7584233621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1231729216 + 31595641 = 35096^2 + 5621^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263324857 - 2⁶ = 1263324793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263324847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631662428 + 631662429.

It is an arithmetic number, because the mean of its divisors is an integer number (631662429).

Almost surely, 2^1263324857 is an apocalyptic number.

It is an amenable number.

1263324857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263324857 is an equidigital number, since it uses as much as digits as its factorization.

1263324857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 1263324857 is about 35543.2814607768. The cubic root of 1263324857 is about 1081.0314953700.

The spelling of 1263324857 in words is "one billion, two hundred sixty-three million, three hundred twenty-four thousand, eight hundred fifty-seven".